Update transmute size lints.

Also moves a few transmute tests to UI tests to better test their
output.

src/test/compile-fail/E0512.rs

@@ -12,5 +12,4 @@ fn takes_u8(_: u8) {}
 
 fn main() {
     unsafe { takes_u8(::std::mem::transmute(0u16)); } //~ ERROR E0512
-                                                      //~| transmuting between 16 bits and 8 bits
 }

src/test/compile-fail/issue-21174.rs

@@ -15,7 +15,7 @@ trait Trait<'a> {
 
 fn foo<'a, T: Trait<'a>>(value: T::A) {
     let new: T::B = unsafe { std::mem::transmute(value) };
-//~^ ERROR: transmute called with differently sized types
+//~^ ERROR: transmute called with types of different sizes
 }
 
 fn main() { }

src/test/compile-fail/issue-28625.rs

@@ -17,7 +17,7 @@ struct ArrayPeano<T: Bar> {
 }
 
 fn foo<T>(a: &ArrayPeano<T>) -> &[T] where T: Bar {
-    unsafe { std::mem::transmute(a) } //~ ERROR transmute called with differently sized types
+    unsafe { std::mem::transmute(a) } //~ ERROR transmute called with types of different sizes
 }
 
 impl Bar for () {

src/test/compile-fail/issue-32377.rs

@@ -21,7 +21,7 @@ struct Bar<U: Foo> {
 
 fn foo<U: Foo>(x: [usize; 2]) -> Bar<U> {
     unsafe { mem::transmute(x) }
-    //~^ ERROR transmute called with differently sized types
+    //~^ ERROR transmute called with types of different sizes
 }
 
 fn main() {}

src/test/compile-fail/packed-struct-generic-transmute.rs

@@ -13,7 +13,7 @@
 // the error points to the start of the file, not the line with the
 // transmute
 
-// error-pattern: transmute called with differently sized types
+// error-pattern: transmute called with types of different sizes
 
 use std::mem;
 

src/test/compile-fail/packed-struct-transmute.rs

@@ -13,7 +13,7 @@
 // the error points to the start of the file, not the line with the
 // transmute
 
-// error-pattern: transmute called with differently sized types
+// error-pattern: transmute called with types of different sizes
 
 use std::mem;
 

src/test/compile-fail/transmute-different-sizes.rs

@@ -17,12 +17,12 @@ use std::mem::transmute;
 
 unsafe fn f() {
     let _: i8 = transmute(16i16);
-    //~^ ERROR transmute called with differently sized types
+    //~^ ERROR transmute called with types of different sizes
 }
 
 unsafe fn g<T>(x: &T) {
     let _: i8 = transmute(x);
-    //~^ ERROR transmute called with differently sized types
+    //~^ ERROR transmute called with types of different sizes
 }
 
 trait Specializable { type Output; }
@@ -33,7 +33,7 @@ impl<T> Specializable for T {
 
 unsafe fn specializable<T>(x: u16) -> <T as Specializable>::Output {
     transmute(x)
-    //~^ ERROR transmute called with differently sized types
+    //~^ ERROR transmute called with types of different sizes
 }
 
 fn main() {}

src/test/compile-fail/transmute-fat-pointers.rs

@@ -15,11 +15,11 @@
 use std::mem::transmute;
 
 fn a<T, U: ?Sized>(x: &[T]) -> &U {
-    unsafe { transmute(x) } //~ ERROR transmute called with differently sized types
+    unsafe { transmute(x) } //~ ERROR transmute called with types of different sizes
 }
 
 fn b<T: ?Sized, U: ?Sized>(x: &T) -> &U {
-    unsafe { transmute(x) } //~ ERROR transmute called with differently sized types
+    unsafe { transmute(x) } //~ ERROR transmute called with types of different sizes
 }
 
 fn c<T, U>(x: &T) -> &U {
@@ -31,11 +31,11 @@ fn d<T, U>(x: &[T]) -> &[U] {
 }
 
 fn e<T: ?Sized, U>(x: &T) -> &U {
-    unsafe { transmute(x) } //~ ERROR transmute called with differently sized types
+    unsafe { transmute(x) } //~ ERROR transmute called with types of different sizes
 }
 
 fn f<T, U: ?Sized>(x: &T) -> &U {
-    unsafe { transmute(x) } //~ ERROR transmute called with differently sized types
+    unsafe { transmute(x) } //~ ERROR transmute called with types of different sizes
 }
 
 fn main() { }

src/test/compile-fail/transmute-from-fn-item-types-error.rs

@@ -1,70 +0,0 @@
-// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-use std::mem;
-
-unsafe fn foo() -> (isize, *const (), Option<fn()>) {
-    let i = mem::transmute(bar);
-    //~^ ERROR is zero-sized and can't be transmuted
-    //~^^ NOTE cast with `as` to a pointer instead
-
-    let p = mem::transmute(foo);
-    //~^ ERROR is zero-sized and can't be transmuted
-    //~^^ NOTE cast with `as` to a pointer instead
-
-    let of = mem::transmute(main);
-    //~^ ERROR is zero-sized and can't be transmuted
-    //~^^ NOTE cast with `as` to a pointer instead
-
-    (i, p, of)
-}
-
-unsafe fn bar() {
-    // Error as usual if the resulting type is not pointer-sized.
-    mem::transmute::<_, u8>(main);
-    //~^ ERROR transmute called with differently sized types
-    //~^^ NOTE transmuting between 0 bits and 8 bits
-
-    mem::transmute::<_, *mut ()>(foo);
-    //~^ ERROR is zero-sized and can't be transmuted
-    //~^^ NOTE cast with `as` to a pointer instead
-
-    mem::transmute::<_, fn()>(bar);
-    //~^ ERROR is zero-sized and can't be transmuted
-    //~^^ NOTE cast with `as` to a pointer instead
-
-    // No error if a coercion would otherwise occur.
-    mem::transmute::<fn(), usize>(main);
-}
-
-unsafe fn baz() {
-    mem::transmute::<_, *mut ()>(Some(foo));
-    //~^ ERROR is zero-sized and can't be transmuted
-    //~^^ NOTE cast with `as` to a pointer instead
-
-    mem::transmute::<_, fn()>(Some(bar));
-    //~^ ERROR is zero-sized and can't be transmuted
-    //~^^ NOTE cast with `as` to a pointer instead
-
-    mem::transmute::<_, Option<fn()>>(Some(baz));
-    //~^ ERROR is zero-sized and can't be transmuted
-    //~^^ NOTE cast with `as` to a pointer instead
-
-    // No error if a coercion would otherwise occur.
-    mem::transmute::<Option<fn()>, usize>(Some(main));
-}
-
-fn main() {
-    unsafe {
-        foo();
-        bar();
-        baz();
-    }
-}

src/test/compile-fail/transmute-impl.rs

@@ -26,7 +26,7 @@ impl<T: ?Sized> Foo<T> {
 
     fn n(x: &T) -> &isize {
         // Not OK here, because T : Sized is not in scope.
-        unsafe { transmute(x) } //~ ERROR transmute called with differently sized types
+        unsafe { transmute(x) } //~ ERROR transmute called with types of different sizes
     }
 }
 

src/test/compile-fail/transmute-type-parameters.rs

@@ -1,54 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// Tests that `transmute` cannot be called on type parameters.
-
-use std::mem::transmute;
-
-unsafe fn f<T>(x: T) {
-    let _: isize = transmute(x);
-//~^ ERROR differently sized types: T (size can vary) to isize
-}
-
-unsafe fn g<T>(x: (T, isize)) {
-    let _: isize = transmute(x);
-//~^ ERROR differently sized types: (T, isize) (size can vary because of T) to isize
-}
-
-unsafe fn h<T>(x: [T; 10]) {
-    let _: isize = transmute(x);
-//~^ ERROR differently sized types: [T; 10] (size can vary because of T) to isize
-}
-
-struct Bad<T> {
-    f: T,
-}
-
-unsafe fn i<T>(x: Bad<T>) {
-    let _: isize = transmute(x);
-//~^ ERROR differently sized types: Bad<T> (size can vary because of T) to isize
-}
-
-enum Worse<T> {
-    A(T),
-    B,
-}
-
-unsafe fn j<T>(x: Worse<T>) {
-    let _: isize = transmute(x);
-//~^ ERROR differently sized types: Worse<T> (size can vary because of T) to isize
-}
-
-unsafe fn k<T>(x: Option<T>) {
-    let _: isize = transmute(x);
-//~^ ERROR differently sized types: std::option::Option<T> (size can vary because of T) to isize
-}
-
-fn main() {}